package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.entity.Setmeal;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetMealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.apache.ibatis.jdbc.Null;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;


@Service
@Slf4j
public class DishServiceImpl implements DishService {
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetMealDishMapper setMealDishMapper;
    @Autowired
    private SetmealMapper setmealMapper;

    /**
     * 菜品新增和口味新增
     * @param dishDTO
     */
    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {
        //插入菜品
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        dishMapper.insert(dish);

        long dishId = dish.getId();
        //插入口味
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(!flavors.isEmpty() && flavors.size() > 0){
            flavors.forEach(dishFlavor->{
                    dishFlavor.setDishId(dishId);
            });
            dishFlavorMapper.insertBatch(flavors);
        }

    }


    /**
     * 菜品分类查询
     * @param dishPageQueryDTO
     * @return
     */
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page<DishVO> dishPage = dishMapper.pageQuery(dishPageQueryDTO);

        long total = dishPage.getTotal();
        List<DishVO> result = dishPage.getResult();
        return new PageResult(total,result);
    }

    /**
     * 菜品批量删除
     * @param ids
     */
    //TODO 业务逻辑可以进行修改方式
    public void deleteBatch(List<Long> ids) {
        //判断当前菜品是否能够删除---是否存在起售中的菜品
        for (Long id : ids) {
            Dish dish = dishMapper.dishById(id);
            if(dish.getStatus() == StatusConstant.ENABLE){
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }

        //判断当前菜品是否能够删除---是否被套餐关联了
        List<Long> setmealId = setMealDishMapper.getSetmealIdByDishId(ids);
        if(setmealId != null && setmealId.size() > 0){
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);

        }
        //删除菜品表中的菜品数据
        for (Long id : ids) {
            dishMapper.deleteByID(id);
            //删除菜品关联的口味数据
            dishFlavorMapper.deleteByDishId(id);
        }
    }

    /**
     * 根据id查询菜品和口味
     * @param id
     * @return
     */
    public DishVO dishWithFlavorById(Long id) {
        Dish dish = dishMapper.dishById(id);
        DishVO dishVO = new DishVO();
        List<DishFlavor> flavors = dishFlavorMapper.getByDishId(id);
        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(flavors);

        return dishVO;
    }

    /**
     * 修改菜品和口味
     * @param dishDTO
     */
    public void updateDish(DishDTO dishDTO) {
        //修改菜品
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        dishMapper.update(dish);
        //删除之前菜品相关联的口味
        dishFlavorMapper.deleteByDishId(dishDTO.getId());
        //存入修改后的口味
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(!flavors.isEmpty() && flavors.size() > 0){
            flavors.forEach(dishFlavor->{
                dishFlavor.setDishId(dishDTO.getId());
            });
            dishFlavorMapper.insertBatch(flavors);
        }

    }

    /**
     * 菜品的起售或禁售
     * @param status
     */

    public void startOrStop(Integer status,Long id) {
        Dish dish = Dish.builder()
                .id(id)
                .status(status)
                .build();
        dishMapper.update(dish);
        //禁用菜品后，将关联了菜品的套餐也禁用
        if(StatusConstant.DISABLE.equals(status)){
            List<Long> ids = new ArrayList<>();
            ids.add(id);
            List<Long> setMealId = setMealDishMapper.getSetmealIdByDishId(ids);
            for (Long Id : setMealId) {
                Setmeal setmeal = Setmeal.builder()
                        .id(Id)
                        .status(status)
                        .build();
                setmealMapper.update(setmeal);
            }
        }
    }

    /**
     * 根据分类id查询菜品
     * @param categoryId
     * @return
     */
    @Override
    public List<Dish> getByCategoryId(Long categoryId) {
        return dishMapper.getByCategoryId(categoryId);
    }

    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }

}
